Van Woerkom, David J.
Koski, Jonne V.
Ungerer, Jann H.
Landig, Andreas J.
- Data Collection
Rights / licenseCreative Commons Attribution 4.0 International
The realization of a coherent interface between distant charge or spin qubits in semiconductor quantum dots is an open challenge for quantum information processing. Here we demonstrate both resonant and non-resonant photon-mediated coherent interactions between double quantum dot charge qubits separated by several tens of micrometers. We present clear spectroscopic evidence of the collective enhancement of the resonant coupling of two qubits. With both qubits detuned from the resonator, we observe exchange coupling between the qubits mediated by virtual photons. In both instances pronounced bright and dark states governed by the symmetry of the qubit-field interaction are found. Our observations are in excellent quantitative agreement with master equation simulations. The extracted two-qubit coupling strengths significantly exceed the linewidths of the combined resonator-qubit system. This indicates that this approach is viable for creating photon-mediated two qubit gates in quantum dot based systems. Show more
ContributorsContact person: Wallraff, Andreas
Contact person: Van Woerkom, David J.
Project leader: Wallraff, Andreas
SubjectQuantum dots; Charge qubits; SOLID STATE ELECTRONICS; MICROWAVE SPECTROSCOPY; CQED
Organisational unit04311 - HPF Hönggerberg
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